Mutual compatibility of superplasticizers (PC, SNF), grinding aids (TEA, glycol) and C3A in Portland cement systems – Hydration, rheology, physical properties and air void characteristics

Kapeluszna, Ewa; Chrabąszcz, Katarzyna

doi:10.1016/j.conbuildmat.2023.130877

Cited by 10 publications

(4 citation statements)

References 58 publications

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“…The development of high performance cement concretes, the modification of the structure of which is provided by the use of chemical and mineral additives of various mechanisms of action, is an actual scientific direction in the field of building materials science [1][2][3][4][5][6][7][8][9][10][11]. Photocatalytic additives are a special type of modifiers that contribute to the creation of photocatalytically active cement systems characterized by a complex of positive properties, such as self-cleaning ability, decompose atmospheric air pollutants, eliminate unwanted odors, etc.…”

Section: Introductionmentioning

confidence: 99%

Chemical activity score of siliceous rocks in development of self-cleaning cement material

Balykov,

Chugunov,

Davydova

2024

E3S Web Conf.

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The development of photocatalytically active cement materials characterized by a complex of positive properties, such as self-cleaning ability, decompose atmospheric air pollutants, eliminate unwanted odors, etc., is actual scientific direction in the field of building materials science. It is known that ‘core-shell’ compositions obtained by precipitation of photocatalyst particles on dispersed carriers (substrates) are one of the effective types of photocatalytic additives for cement systems. It should be noted that mineral raw materials of various genesis can act as a substrate. Foreign and domestic experience in obtaining ‘core-shell’ photocatalytic systems for cement materials shows that the type of photocatalytic agent carrier has a primary influence on the final parameters of the synthesized composite modifier. The purpose of this study was to establish patterns of influence of the composition of 3 types of opal-cristobalite rocks (diatomite, trepel, opoka) on their chemical activity. It was identified that the reactivity of siliceous rocks grows in the order of trepel → opoka → diatomite. Meanwhile, it was recorded that increase in the content of opal silica in the composition contributed to growth in the sedimentary rock reactivity. The obtained research results indicate the prospects of using diatomite and opoka as dispersed carriers of photocatalytic agents in the composition of self-cleaning cement concretes.

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Section: Introductionmentioning

confidence: 99%

Chemical activity score of siliceous rocks in development of self-cleaning cement material

Balykov,

Chugunov,

Davydova

2024

E3S Web Conf.

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“…Triethanolamine (TEA) forms mild complexes with calcium ions and modifies the surface of poorly soluble calcium salts. This effect is well known in the cement industry, which uses triethanolamine to improve clinker grinding and mortar hydration [ 38 , 39 , 40 ]. This work confirmed the positive effect of triethanolamine on endpoint detection.…”

Section: Introductionmentioning

confidence: 99%

Determination of Calcium in Meat Products by Automatic Titration with 1,2-Diaminocyclohexane-N,N,N’,N’-tetraacetic Acid

Shyichuk,

Kowalska,

Shyychuk

et al. 2023

Molecules

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Mechanically separated meat (MSM) is a by-product of the poultry industry that requires routine quality assessment. Calcium content is an indirect indicator of bone debris in MSM but is difficult to determine by EDTA titration due to the poor solubility of calcium phosphate. Therefore, 1,2-diaminocyclohexane-N,N,N’,N’-tetraacetic acid was used instead, which has two orders of magnitude higher affinity for calcium ions. In addition, the auxiliary complexing agents triethanolamine and Arsenazo III, an indicator that is sensitive to low calcium concentrations, were used. Automatic titration endpoint detection was performed using an immersion probe at 660 nm. It has been shown that the color change in Arsenazo III can also be read with an RGB camera. The CDTA titration procedure has been tested on commercial Bologna-type sausages and the results were in line with AAS and ICP reference data. The content of calcium in sausages turned out to be very diverse and weakly correlated with the content of MSM. The tested MSM samples had a wide range of calcium content: from 62 to 2833 ppm. Calcium-rich poultry by-products include fat and skin (115 to 412 ppm), articular cartilage (1069 to 1704 ppm), and tendons (532 to 34,539 ppm). The CDTA titration procedure is fully suitable for small meat processing plants due to its simplicity of use and low cost.

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“…By improving the particle size distribution and surface area of the cement, grinding aids can enhance the reactivity of the cement and accelerate the hydration process, shortening the setting time (Assaad and Issa, 2014;Hashem, Hekal, and El Wahab, 2019;Kapeluszna and Chrabąszcz, 2023;Wang, Tian, and Mao, 2023). Grinding aids can also affect the rheology of cement (Assaad, 2015), making it more fluid and easier to work with, reducing the risk of cracking.…”

Section: Introductionmentioning

confidence: 99%

A study of different grinding aids for low-energy cement clinker production

Zan,

Ishak

2023

J. S. Afr. Inst. Min. Metall.

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Cement production requires significant energy, and entails high costs and CO2 emissions. This is because the clinker requires very fine grinding. Grinding aids can improve production and fineness and decrease energy consumption by reducing the agglomeration of particles and protecting the balls and liners in the mill. In this study we compare the effects of three different grinding aids on clinker grinding using a ball mill. A commercial grinding additive, triethanolamine (TEA), and two industrial grinding aids (GAA079 and GAA088) were compared by ball milling tests, with additions of 0.05, 0.25, 0.50 and 1.00 wt%. The industrial grinding aids were characterized using gas chromatography-mass spectrometry (GC-MS). Particle size and morphological analyses were performed using SEM and XRD. The best results were obtained with 0.25% GAA088, which has a higher active component of diethanolamine isopropanolamine (DEIPA) than TEA. The unique combination of TEA and DEIPA in GAA088 enhances grinding efficiency and significantly improves the particle size distribution compared to TEA alone.. The grinding aids produced smooth rounded particles, which have a smaller specific surface area, enhancing the quality of the cement. XRD showed no significant structural distortion with or without grinding aids, and it was also found that the grinding aids helped decrease ball coating during grinding. The use of grinding aids can significantly improve clinker production and fineness while decreasing energy consumption, which can help reduce the costs and CO2 emissions associated with cement production.

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Mutual compatibility of superplasticizers (PC, SNF), grinding aids (TEA, glycol) and C3A in Portland cement systems – Hydration, rheology, physical properties and air void characteristics

Cited by 10 publications

References 58 publications

Chemical activity score of siliceous rocks in development of self-cleaning cement material

Chemical activity score of siliceous rocks in development of self-cleaning cement material

Determination of Calcium in Meat Products by Automatic Titration with 1,2-Diaminocyclohexane-N,N,N’,N’-tetraacetic Acid

A study of different grinding aids for low-energy cement clinker production

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